Magnetic disk assembly

{
  "publication_number": "US3635608A",
  "country": "US",
  "kind": "A",
  "title": "Magnetic disk assembly",
  "abstract": "A cartridge for a magnetic disk assembly includes a cover for enclosing a multiplicity of magnetic disks, the assembly having top, side, and bottom portions, wherein the side portion has an aperture for permitting the insertion of a magnetic transducer, the bottom portion has means for connecting the enclosed disk assembly to a drive unit and a removable base for covering the aperture in the side portion.",
  "claims": [
    "1. A cartridge for a magnetic disk assembly comprising: a cover for enclosing a magnetic disk assembly having a top, side and bottom portions; said side portion having an aperture for permitting the insertion of a transducer; said bottom portion having means for connecting an enclosed 7 disk assembly to a drive unit; a removable base for covering said aperture in the side portion; a handle mounted on the top portion of the cover, said handle being adapted to be folded against the top portion of said cover, said cover including a well into which said handle is positioned when folded, and said handle including means to be selectively operated for carrying said cartridge or for releasing said base from said cover.",
    "2. A cartridge as in claim 1, wherein said connecting means comprises an aperture in the bottom of the cover, and in which the base is adapted to cover said aperture in the bottom of the cover.",
    "3. A cartridge as in claim 1, including a magnetic disk assembly enclosed within said cover.",
    "4. A cartridge as in claim 1, wherein the side portion of the cOver has an aperture for permitting the insertion of a cleaning brush.",
    "5. A cartridge as in claim 1, in which the cover and base are shaped to provide a stacking ring.",
    "6. A cartridge as in claim 1, including a rubber sealing ring between the cover and the periphery of the base.",
    "7. A cartridge as in claim 6, in which the cover and the base include air vents to allow the cover to be removed without air drag, when the seal provided by the rubber sealing ring is broken.",
    "8. A cartridge as in claim 6, in which the base has an air vent covered by a filter.",
    "9. A cartridge for a magnetic disk assembly comprising: a cover for enclosing a magnetic disk assembly having a top, side and bottom portions; said side portion having an aperture for permitting the insertion of a transducer; said bottom portion having means for connecting an enclosed disk assembly to a drive unit; a removable base for covering said aperture in the side portion; a handle mounted on the top portion of the cover, said handle being adapted to be folded against the top portion of said cover, said cover including a well into which said handle is positioned when folded, and said handle including means to be selectively operated for carrying said cartridge or for releasing said base from said cover; means for magnetically attaching said base to said cover, including an armature, and a magnet fixed to the base for contacting said armature when the cover and base are fitted together; and said handle including a drawbar connected to a drawplate, said drawplate being effective when the drawbar is actuated by the handle to separate the armature from said magnet and drive unit.",
    "10. A cartridge as in claim 9, wherein said drive unit includes a magnet on said drive unit for engaging said armature, whereby the disk assembly can be rotated by the drive unit.",
    "11. A cartridge as in claim 10, in which the disk assembly includes a flexible diaphragm having a tapered hole at its center, which tapered hole is adapted to engage a conical end of a drive spindle on said drive unit.",
    "12. A cartridge as in claim 11, in which said armature is positioned on the periphery of said flexible diaphragm.",
    "13. A cartridge as in claim 9, in which the handle includes means for releasing the cover from the drive unit.",
    "14. A cartridge as in claim 9, in which the handle has a latch which can be operated so that the drawbar is lifted when the handle is being operated for releasing the cover.",
    "15. A cartridge as in claim 14, in which the handle has a locking means which prevents release of the latch so that the drawbar cannot be released when the handle is being operated for releasing the cover."
  ],
  "cpc": [
    "G11B 23/0322",
    "G11B 17/022",
    "G11B 17/03"
  ],
  "ipc": [
    "G11B 17/022",
    "G11B 17/03",
    "G11B 23/03"
  ],
  "assignees": [
    "International Business Machines Corp"
  ],
  "inventors": [
    "Howard S Crouch",
    "Hugh G Dickie",
    "Albert H Metcalfe",
    "Leo J Rigbey"
  ],
  "filing_date": "1970-03-18",
  "publication_date": "1972-01-18",
  "grant_date": "1972-01-18",
  "priority_date": "1969-03-26",
  "application_number": "US-3635608D-A",
  "family_id": "10066069",
  "cited_by_count": 30,
  "citations": [
    "US2030465A",
    "US2147482A",
    "US2217307A",
    "US3074545A",
    "US3526884A",
    "US3369653A",
    "US3509992A"
  ]
}